<template>
	<view>
		<view class="search-box">
			<!-- 使用 uni-ui 提供的搜索组件 -->
			<uni-search-bar @input="input" :radius="50" cancelButton="none"></uni-search-bar>
		</view>
		<!-- 搜索建议 -->
		<view class="sugg-list" v-if="searchResult.length">
			<view class="sugg-item" v-for="(item, i) in searchResult" :key="i" @click="goDetail(item.goods_id )">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" v-if="historys.length" @click="clearList"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history-list">
				<uni-tag :text="item" v-for="(item, i) in historys" :key="i" @click="goList(item)"></uni-tag>
			</view>
		</view>

	</view>
</template>

<script>
	export default {
		data() {
			return {
				kw: '',
				timer: null,
				searchResult: [],
				// 搜索历史
				historyList:uni.getStorageSync('kwlist') ? JSON.parse(uni.getStorageSync('kwlist')) : []


			};
		},
		computed: {
			historys() {
				return [...this.historyList].reverse()
			}
		},
		methods: {
			input(e) {
				clearTimeout(this.timer)

				this.timer = setTimeout(() => {
					this.kw = e.value
					this.getSearchList()
				}, 500)

			},
			async getSearchList() {
				if (this.kw === '') {
					this.searchResult = []
					return
				}
				// 发起请求，获取搜索建议列表
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/qsearch', {
					query: this.kw
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				this.searchResult = res.message
				this.saveSearchHistory()
			},
			goDetail(val) {
				console.log(val);
				uni.navigateTo({
					// 指定详情页面的 URL 地址，并传递 goods_id 参数
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + val
				})
			},
			saveSearchHistory() {
				// 1. 将 Array 数组转化为 Set 对象
				const set = new Set(this.historyList)
				// 2. 调用 Set 对象的 delete 方法，移除对应的元素
				set.delete(this.kw)
				// 3. 调用 Set 对象的 add 方法，向 Set 中添加元素
				set.add(this.kw)
				// 4. 将 Set 对象转化为 Array 数组
				this.historyList = Array.from(set)
				uni.setStorageSync('kwlist', JSON.stringify(this.historyList))


			},
			goList(val){
				 uni.navigateTo({
				    url: '/subpkg/goods_list/goods_list?query=' + val
				  })
			},
			clearList(){
				this.historyList=[]
				uni.removeStorageSync('kwlist')
				
			}


		},
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
	}

	.sugg-list {
		padding: 0 5px;

		.sugg-item {
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			display: flex;
			align-items: center;
			justify-content: space-between;

			.goods-name {
				// 文字不允许换行（单行文本）
				white-space: nowrap;
				// 溢出部分隐藏
				overflow: hidden;
				// 文本溢出后，使用 ... 代替
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}

	.history-box {
		padding: 0 5px;

		.history-title {
			display: flex;
			justify-content: space-between;
			align-items: center;
			height: 40px;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}

		.history-list {
			display: flex;
			flex-wrap: wrap;

			.uni-tag {
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
</style>
